Means for fastening the heald frame in looms



Jan. 22, 1963 v. svA-r? 3,074,438

MEANS FOR FASTENING THE HEALD FRAME 1N LooMs Filed June 15, 19'60 3,074,438 Patented Jan. 22, 1963 4tice 3,074,438 MEANS FSR FASTENING THE HEALD FRAME IN LOMS Vladimir Svaty, Liberec, Czechosiovakia, assigner to Sdruzeni podniku textilniho strojirenstvi, Chrastava,

Czechoslovakia Fiied .lune 15, 1950, Ser. No. 36,246 Claims priority, application Czechoslovakia .lune l5, i959 4 Claims. (Ci. 139-91) The present invention relates to a device for mounting the heddles of a loom on an actuating lever mechanism by which the reciprocation of the heddles is eiected.

One construction according to the prior art provides adjusting members below the heddles which cause a shortening of the length of the actuating levers controlling the heddles, and in a smaller angular displacement of the actuating levers.

This construction has certain disadvantages when used in looms in which the pick is effected by hydraulic means, since the devices are exposed to the effects of water which condenses, Yor is deposited on the parts of the loom due to moisture produced by the water jet entraining the weft. Such moisture may cause corrosion of metal parts, and also disadvantageously etfect non-corrosive materials,

because theiubricating oil is washed oil the journals of the device.

Another arrangement according to the prior art supports the actuating members as well as the heddles on both sides for parallel movement, resulting in a complicated construction.

It is one object of the present invention to overcome the disadvantages of prior art constructions, and to provide a simple device for connecting the heddle frames to actuating members.

Another object of the invention is to provide an arrangement of this type which is inexpensively manufactured and particularly suitable for looms including a hydraulic picking mechanism.

Another object of the invention is to provide a heddle frame supporting arrangement in which the mounting parts of the heddles are protected from the corrosive effect of water.

ln accordance with the present invention, the device is located directly in a recess provided in the lower portion of the heddle frame. The device comprises a pivot pin having a circular portion and a narrower guide portion with a pair of guide surfaces so that it is possible to slide an open, part-circular recess of an actuating lever onto the guide portion, and from there in axial direction of the pin on to the circular portion of the pin which serves as a journal. A leaf spring holds the actuating lever in position, and has to be compressed before the actuating lever can be moved to the guide portion of the pin from which the actuating lever can be easily removed.

Further advantages and features of the present invention will appear from the ensuing description and accompanying drawings, wherein FIG. 1 is a fragmentary elevational view of a heddle frame supporting arrangement according to the present invention with wall portions broken ofi;

Flf. 2 is a cross-sectional view taken on line 2 2 in FiG. l; and

FIG. 3 is a fragmentary sectional View taken on line 3-3 in FIG. l.

A hollow heddle frame support 1 is provided at its lower edge with a cutout 8 into which an actuating lever 6 projects. Actuating lever 6 has a recess which is composed of a circular opening 9 and of a slot it?. A pivot pin 4 is secured by rivets 2 and 3 to a side wall of support 1, and has a circular portion matching the diarneter of the circular opening 9. Pivot pin 4 has a flat guide portion 7 bounded by a pair of parallel guide surfaces which are spaced equal distances from the periphery of the circular portion of the pivot pin 4. The distance between the two guide surfaces of the flat portion 7 matches slot iti. A bent leaf spring 5 has two ends abutting against a side wall of support 1, and a central slotted portion which is guided on the flat pin portion 7, and abuts on the shoulders formed between thc circular pin portion and the flat pin portion.

FIGS. l and 3 show the apparatus in an inoperative position, While the loom is prepared for a Weaving operation. Each heddle frame support 1 is mounted on a pair of actuating levers 6 only one of which is shown, by inserting the upper end of each actuating lever 6 into the cutout 8 in the illustrated position. Thereupon the support l is shifted to the right, until the iiat portion 7 slides through the slot 10 into opening 9. Spring 5 is compressed during this operation so that its central portion lies dat against the front wall of support l. When the circular opening 9 is centered on the iiat portion 7, spring 5 urges support 1 and lever 6 to move to a position in which the circular opening 9 is located on the circular portion of pin l4, so that the heddle frame support l is pivotally mounted on the actuating lever 6. When a pair of actuating levers 6 supporting a heddle frame support l is reciprocated in this position in a conventional manner, the heddle frame is reciprocated, while the part-circular bearing surface of the circular opening 9 turns on the matching circular peripheral surface of the circular portion of pin 4.

If the heddle frame with support l is to be removed, it is first pressed into a position in which spring 5 is compressed by lever 6 so that the recess 9, l@ is axially shifted and located on the flat pin portion 7. ln this position, support l can be longitudinally shifted with the at portion 7 sliding out of slot itl until the position of FIG. 1 is again obtained. It is now possible to litt support l with the heddle frame so that it is removed from the actuating levers 6.

The pivotal connection between the actuating levers 6 and the heddle frame support 1 is not only very quickly assembled and separated, but is also fully protected against water dripping from above, which is sometimes unavoidable in pneumatic looms.

lt will be appreciated that the invention is in no way limited to hollow frame supports l, since the support may be provided with a recess, or the entire device may be mounted on extended side Walls of the support.

i claim:

l. A heddle frame supporting arrangement comprising a support; a pivot pin secured to said support and having a circular portion and a guide portion with a pair of guide surfaces; an actuating lever having a recess composed of a slot bounded by edges spaced substantially the same distance as said guide surfaces, and of an opening into which said slot opens, said opening being bounded by a part-circular bearing surface having a radius substantially equal to the radius of said circular pin portion, said bearing surface being mounted on said circular pin portion for turning movement so that said support is pivotally connected with said actuating lever; and holding means located on said guide portion for holding said actuating lever on said circular pin portion so that movement of said holding means away from said pin portion is required for moving said lever to a position in which said recess is located on said guide portion permitting removal of said lever with said guide portion sliding through said slot.

2. A heddle frame supporting arrangement comprising a support; a pivot pin secured to said support and having a circular portion and a guide portion with a pair of guide surfaces; an actuating lever having a recess cornposed of a slot bounded by edges spaced substantially the same distance as said guide surfaces, and of an opening into which said slot opens, said opening being bounded by a part-circular bearing surface having a radius substantially equal to the radius of said circular pin portion, said bearing surface being mounted on said circular pin portion for turning movement so that said support is pivotally connected with said actuating lever, and a spring having an opening through which said guide portion passes, said spring abutting said lever for holding the same on said circular pin portion so that compression of said spring is required for moving said lever to a position in which said recess is located on said guide portion permitting removal of said lever with said guide portion sliding through said slot.

3, A heddle frame supporting arrangement comprising a hollow elongated support having a pair of side Walls, and a bottom-wall, said bottom Wall being formed with a cutout; a pivot pin inthe interior of said hollow supports and having yends secured to the inner surfaces of said side walls, said pivot pin having a circular portion adjacent one `side Wall, and a dat guide portion adjacent the other side wall, and said flat guide portion having a pair of parallel guide surfaces spaced equal radial distances from the periphery of said circular portion; an actuating lever having a recess composed of a slot bounded by edges spaced substantially the same distance as said guide surfaces, and of an opening into which said slot opens, said opening being bounded by a part-circular bearing surface having a radius substantially equal to the radius of said circular pin portion, said bearing surface being mounted on said circular pin portion for turning movement so that said support is pivotally con- Y nected with said actuating lever; and a leaf spring having end portions abutting said other side wall and a central portion formed with an opening through which said flat guideportion passes, said central portion resiliently abutting said lever for holding said lever on said circular pin portion so that compression of said spring is required for moving said lever to a position in which said recess is located on said guide portion permitting removal of said lever with said guide portion sliding through said slot.

4. A heddle frame supporting arrangement as set forth in claim 3, wherein said at guide portion is bounded by two opposite part-circular surfaces having the same diameter as said circular pin portion, and by two parallel planar guide surfaces spaced equal distances from-the axis of said circular pin portion.

References Cited in the le of this .patent UNITED STATES PATENTS 2,69,330 Rossmann Feb. 2, 1937 2,839,321 Selig July 17, 1958 FOREIGN PATENTS Y 1,160,622 France u ,Mar. 3, 1958 536,407 Italy Dec. 2, 1955 

1. A HEDDLE FRAME SUPPORTING ARRANGEMENT COMPRISING A SUPPORT; A PIVOT PIN SECURED TO SAID SUPPORT AND HAVING A CIRCULAR PORTION AND A GUIDE PORTION WITH A PAIR OF GUIDE SURFACES; AN ACTUATING LEVER HAVING A RECESS COMPOSED OF A SLOT BOUNDED BY EDGES SPACED SUBSTANTIALLY THE SAME DISTANCE AS SAID GUIDE SURFACES, AND OF AN OPENING INTO WHICH SAID SLOT OPENS, SAID OPENING BEING BOUNDED BY A PART-CIRCULAR BEARING SURFACE HAVING A RADIUS SUBSTANTIALLY EQUAL TO THE RADIUS OF SAID CIRCULAR PIN PORTION, SAID BEARING SURFACE BEING MOUNTED ON SAID CIRCULAR PIN PORTION FOR TURNING MOVEMENT SO THAT SAID SUPPORT IS PIVOTALLY CONNECTED WITH SAID ACTUATING LEVER; AND HOLDING MEANS LOCATED ON SAID GUIDE PORTION FOR HOLDING SAID ACTUATING LEVER ON SAID CIRCULAR PIN PORTION SO THAT MOVEMENT OF SAID HOLDING MEANS AWAY FROM SAID PIN PORTION IS REQUIRED FOR MOVING SAID LEVER TO A POSITION IN WHICH SAID RECESS IS LOCATED ON SAID GUIDE PORTION PERMITTING REMOVAL OF SAID LEVER WITH SAID GUIDE PORTION SLIDING THROUGH SAID SLOT. 